i think cfl is fine more watts is obviously better(for the most part). My fuge is way better since adding led but it is 70watts of led and if i were to add 125+watts of cfl instead, i bet i would be doing just as good(the water might also boil and i don't think that a cfl that big would fit above my fuge).
But for the most part bigger = better and for cfl 6500k seems best and if you are going led the spectrum does matter just make sure u are mostly red with a bit of blue/white and or orange. I don't know if the violet i have in there helps but i know it doesn't hurt and there are one in my unit so it won't be a big player either way.
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Nick
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